CN104481868A

CN104481868A - Oil circuit of power end pressure lubrication system of reciprocating pump

Info

Publication number: CN104481868A
Application number: CN201410465731.3A
Authority: CN
Inventors: 唐春玲; 王雨团; 郑宏乾; 王别好; 李志亮; 汤文婕; 何宝仪; 李小英
Original assignee: AERONAUTICAL POWER PUMP INDUSTRY Co BAOJI
Current assignee: AERONAUTICAL POWER PUMP INDUSTRY Co BAOJI
Priority date: 2014-09-15
Filing date: 2014-09-15
Publication date: 2015-04-01

Abstract

Disclosed is an oil circuit of a power end pressure lubrication system of a reciprocating pump. The new power end pressure lubrication mode aims at overcoming the defects of the traditional lubrication mode, the reverse thinking design is performed on the structure, and accordingly the lubrication requirements of motion pairs arranged at a power end can be met, a crankshaft is convenient to machine, drilling on the crankshaft is avoided, and the strength of the crankshaft cannot be weakened. The lubricating oil from an oil tank passes through a gear oil pump, an oil filter and an overflow valve to be divided into two branches, wherein one branch of lubricating oil returns back to the oil tank after pressure adjustment through the overflow valve and the other branch of lubricating oil passes through a slide namely a guide plate, a cross head, a connecting rod small-head-tile, a cross head pin, a connecting rod body, a connecting rod large-head-tile and the crankshaft to return back to the oil tank. According to the oil circuit of the power end pressure lubrication system of the reciprocating pump, the crankshaft structure design is adopted, an oil hole is not drilled inside the crankshaft, and accordingly the machining difficulty of the crankshaft is reduced, the integral strength of the crankshaft is improved, and the bearing strength and the transmission power of the complete machine are effectively improved and the oil distribution of lubricating points is reasonably deigned to meet the lubrication and cooling requirements of working surfaces.

Description

Reciprocatin pump power end force-feed lubrication system oil circuit

Technical field

The oil circuit that the present invention relates to the Reciprocatin pump power end force-feed lubrication system in conveying equipment for fluid substances improves.

Background technique

The reciprocating pump at home and abroad field such as each elephant, mine, chemical industry, electric power all has and widely applies.At reciprocal pump power end, all have relatively rotate and the motion vice division chief of relative sliding, all need to lubricate, particularly when transmitted plunger force is large, power greatly, pump speed height time, also should adopt pressure lubrication.

In order to reduce friction, wearing and tearing, and cool kinematic pair working surface, take away frictional heat, keep the gap between kinematic pair working surface, prevent from working surface overheated and cause killing or burning to death, extend the working life of reciprocating pump, in reciprocal pump power end, every motion vice division chief having rotation and relative sliding relatively, all needs to lubricate.Therefore, various reciprocal pump power end is all equipped with lubrication system.Particularly transmitting that large, the power of plunger force is large, pump speed height time, also should adopt pressure lubrication.

At present, the oil circuit design of the widely used power end force-feed lubrication system of domestic and international reciprocating pump is (as shown in Fig. 1-1,1-2,1-3): from fuel tank through gear oil pump,---oil purifier---relief valve is further divided into two to lubricant oil, one through slideway---crosshead gets back to fuel tank, and another is through bent axle---big end bearing shell---connecting rod shank---connecting rod small end bearing shell-return fuel tank.This lubricating system must bore oilhole on bent axle, as the passage of lubricant oil.Its deficiency is: when the oilhole on bent axle is when the joint of axle journal and crank, can make this place's strength reduction.Even if avoid joint, offer the oilhole outlet on crank pin along crank center line direction, this outlet passes through place mutually with journal surface, if process bad, very easily causes stress to concentrate, thus reduces crankshaft fatigue strength.

Summary of the invention

The object of the invention is the deficiency for conventional lubrication mode, carry out reverse thinking design from structure, invent the lubrication needs that can ensure each kinematic pair of power end, facilitate Crankshaft Machining again, avoid holing on bent axle, guarantee the new power end pressure lubrication mode that crankshaft strength is not weakened.

The scheme realizing above-mentioned purpose is:

(1) oil circuit mentality of designing:---oil purifier---relief valve is divided into two from fuel tank through gear oil pump to make lubricant oil, one through relief valve adjustment pressure, get back to fuel tank, another is through slideway (guide plate), and------------bent axle returns fuel tank to crosshead pin to connecting rod small end watt to crosshead with connecting rod shank---connnecting rod big end watt---.

(2) crankshaft structure design, not at bent axle inner part drilling oilhole, reduces Crankshaft Machining difficulty, improves Whole Crankshaft Strength, and effectively improve bearing strength and the transmission power of complete machine.

(3) oil mass of each lubricating point of appropriate design is distributed, and ensures the needs meeting each working surface lubrication and cooling.

The feature of such scheme is:

(1) neoteric oil circuit mentality of designing, conventional oil circuit of comparing is reverse thinking, no longer bores oilhole prepared condition for bent axle inside;

(2) after re-starting crankshaft designs, no longer on bent axle, bore oilhole, improve Whole Crankshaft Strength, and effectively improve bearing strength and the transmission power of complete machine;

(3) reasonable distribution of each lubricating point oil mass, makes the needs of each working surface lubrication and cooling be met;

(4) reduce Crankshaft Machining difficulty, reduce labor strength and processing cost.

Accompanying drawing explanation

Fig. 1-1, Fig. 1-2, Fig. 1-3 are conventional lubrication mode and crankshaft oil hole distribution map.Wherein Fig. 1-1 is Reciprocatin pump power end schematic diagram, and Fig. 1-2 is Fig. 1-1B-B view, and Fig. 1-3 is bent axle schematic diagram (wherein having how empty oil circuit).

Fig. 2-1, Fig. 2-2, Fig. 2-3 are lubricating system of the present invention and crankshaft oil hole distribution map.Wherein Fig. 2-1 is Reciprocatin pump power end schematic diagram, and Fig. 2-2 is Fig. 2-1B-B view, and Fig. 2-3 is bent axle schematic diagram (wherein not having oilhole).

Figure number illustrates: 1, slideway 2, crosshead 3, connecting rod small end watts 4, crosshead pin 5, main oil pipe 6, connecting rod 7, connnecting rod big end watts 8, bent axle.

Embodiment:

(1) main structure summary (see accompanying drawing 2-1,2-2,2-3):

By having reasonable Arrangement and the distribution of oilhole on relative movement part at slideway, crosshead, connecting rod small end watt, crosshead pin, connecting rod shank, connnecting rod big end watt etc., each oilhole is made to form a unobstructed grease channel, when lubricant oil is through each kinematic pair, both can each moving parts of sufficient lubrication, before the road direction that one of has again sufficiently pressure to make, ensure primary lubricant point: connecting rod shank and connnecting rod big end watt, connnecting rod big end watt needs with the lubrication of bent axle.

(2) cardinal principle summary:

Lubricant oil pressurizes through gear pump, and import from main oil pipe, along slideway (guide plate),---crosshead---------advance crosshead pin connecting rod small end watt, returns fuel tank after completing lubrication task by the route of connecting rod shank---connnecting rod big end watt---bent axle.

Claims

1. Reciprocatin pump power end force-feed lubrication system oil circuit, its feature lubricant oil way flows through path: lubricant oil pressurizes through gear pump, import from main oil pipe, along slideway,---crosshead---------advance crosshead pin connecting rod small end watt, returns fuel tank after completing lubrication task by the route of connecting rod shank---connnecting rod big end watt---bent axle.